The funny part about this is, it's only "not for sale in California" to the general public. Anyone with a business license (which is free) can still purchase those dyes, glues, etc. and a number of stores carry them right next to the other stuff.
Most of the time, the reason it's not available to the general public is not due to the use of the product, it's a matter of proper disposal of the waste; rags, bottles, excess liquid, and a quick call or stop by the local fire department and they'll be happy to tell you if anything special needs to be done.